Water Treatment Operator-in-Training (OIT) Practice Test

A positive displacement pump is specifically designed to move fluids by repeatedly forcing them into a discharge pipe. This type of pump is advantageous for applications that require consistent flow rates and a high level of pressure, which can be essential for certain systems. In drinking water distribution systems, maintaining constant pressure and delivering a steady flow of water is crucial, especially in varying demand situations. Positive displacement pumps can effectively ensure that water is delivered at the right pressure. For stormwater management systems, while gravity is often utilized for water flow, there are scenarios where pumps are necessary to move water against gravitational forces, especially in areas susceptible to flooding or where drainage needs to be actively controlled. Positive displacement pumps can assist in these cases by efficiently managing the flow of stormwater. In wastewater treatment, the removal and transfer of sludge or other viscous materials is often required. Positive displacement pumps are well-suited for handling these demanding conditions, as they manage the thick, heavy flows commonly found in wastewater. Considering the requirements of these systems, it becomes clear that the utility of positive displacement pumps is relevant across drinking water distribution, stormwater management, and wastewater treatment systems. Therefore, the notion that all these systems typically require positive displacement pumps aligns with their operational needs.